Ampowr Inverters

Supported Devices

Device Type	Variants	Modbus TCP (Ethernet)	RS485
Ampihome	Single-Phase	❌	✅
	Three-Phase		❌

Wiring

The Sofar EMS and the Ampihone inverters communicate via RS485 or Ethernet.

Ethernet

For correct ethernet wiring: Follow the the guidelines for ethernet wiring.

RS485

RS485 Wiring

• For correct RS485 wiring: Follow the guidelines for RS485 wiring.
• If the wiring shown in the table below is incorrect, please let us know.
• There is no general consensus in the industry about the usage of A and B for the RS485 polarity, so it may be counterintuitive and opposite of what you might expect for some devices.

Device	Sofar EMS model OM1	Sofar EMS model IG8	RS485-USB converter	RS485-Ethernet converter
Pin 7 (White-Brown)	RS485 A	RS485_POS	RS485 A	TX+
Pin 8 (Brown)	RS485 B	RS485_NEG	RS485 B	TX-
N/A	RS GND	GND	Not available	G

Configuration

Ampihome Single-Phase

The Ampihome Single-Phase needs to be set to Slave Secondary Port:

1. Open the ESS Link app
2. Select "My" in the bottom-right corner
3. Select "My Device"
4. Select on the device's "Comm No."
5. Select "Parameter Settings"
6. Set "Working Mode" to "Timed Charge Mode (C&D)"
7. Select "Advanced" in the top-right corner
8. Set "BMS1 RS485 Multiplexing" to "Slave Secondary Port"

NOTE: RS485 Device Addresses

• You MUST give each device on the RS485 bus a unique address. Check the manual of the device on how to do this.
• Use lower addresses first (1, 2, ...) because the Sofar EMS will find them faster!
• For each device, it is generally recommended to stick with the factory default baud rate, parity, and stop bits. The Sofar EMS will scan on those first.